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Unire-nr YSimfree EDWARD J. DAsoHBAeH, on ri'rrsnnne, rnnisrh einen PuooLNe-FURNAGE.

To cil-Z wimmez't may concern.- Be it'knewn that l, EDWliRD .T. Inserieren, of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented a new be a full, clear, and exact description thereof.J

and useful ,improvement in Puddlingllur#` naees; and ido hereby declare the folle wing to My invention relates to an improvement in metallurgical furnaces, and it consists in the arrangement and construction of devices for heating the furnace where hydrocarbon gases are employed as fuel.

am aware that natural gas and other hydrocarbon gases have been employed, either alone or in connection with solid fuel, for the purpose of heating metallurgical land other f furnaces, and also that Various devices have that theJ gas and air shall "be thoroughlybeen employed imeedin'g the gasto the i'urnece. In the use of natural. gas, however, several more Aor less objectionable features have neen met, among which are the iaets that the supply of gas, is apt; to be intermittent, that it is difeult to concentrate, the heat in the hody of the furnace, and also that Where there'is en imperfect mingling ofthe air and gas the metal in the furneeeis eut orburned and rendered hard and brittle. i

Y The obj eetef :ny-invention is'th ereforejrstf, to enstrnot the furnace "so that either gas or solid'fuel-may be employed therein,A and, seeond,`to arrange and vconstruct the burners so mingled hefo're entering the combustion-cham ber'.- j l I will' now describe my invention, so that others skilledi'n the art nia-y employ the seme,

referen eeheinghad to the accompanying drawings, forming part of this specification, in'

- 4"Figure 1 is a vertical `seetional vien' of my" In the drawings, a represents the lire-chainher ,of the peddling-furnace, Z1 the bridgeu wall, and e the Working-Chamber. Along the bottoni oi' the ire-ehamber e are the grate bars d, below which is the ash-pit e. `These grateb'arsd are so arranged that any one or all of them may be readily drawn from the fire chamber. This peddling-furnace is so eenstrueted that it may he heated by .means of solid:

earbonaeeous fuel in the usual manner. lVhen, however, it is desired to employ nali-nral or other hydrocarbon gas as i'uel, l ein ploy a gasflnrngr similar to that shown in Fig. 4, which burner nets, in combination with/Mn surrounding flue, in supplying mingled and air to `the. furnnee. hose iiues j' inav be situated. ei ther below or upon the grate-bars.` l prefer, however, to place them below the grate bars in the aslrpit, as shown in Fie. l, and they are 'formed by the partition-wall lz, which exi tends across the ash-pit at right angles to the line ofthe grate-bars and thepnrtitionn'all i,

"which intersectsY the wall Zia-nd extends thereto from the front Wall, These walls 1L and may be built of fire-brick in sneh a manne;- thot they may he at any time easily removed. ln the front wall, l', opening into the lower portion' of the iiuesf, are. the nir-passages and dempers m. It' desired, 'these walls [i and fi may be huilt on the grate-bars, in which ease the spaee between the wall h and the bridge.- wall should vbe filled in with pieees of lorek and sand, as shown in Fig. 2. In these dues j' `are placed the gasburners p, which are formed of tivo pipes or cylinders, j) pf, placed one inside of the other, so es to form a gas passage between the two cylinders and an air'- passage through the inner cylinder, the gas passage being,- closed at the top end bott-om, the ges escaping hrough jets g at the top of the burner, which jets are inclined, so as to impart a whirling movement to the gos as it passes from the burner. These burners are placed in the ilues f in arertiealposition, so that a current of air shall pass up through the flue around the burner, and also through the pipe p', while the gas passes from the burner between the two currents of air, and becomes thoroughly mingled therewith vloefore reaehing the top of the ilues. he proportioned in size te the size oi' the finesm that is, too large a space must not exist be tween the sides of the ilue and the burner, as the air and gus must not be allowed to pass over the bridge-wall in separate currents, the operation being on the saine principle as that of an Argand burner.

The burners should l `Although I have only shown two lines and -iheir respect-ive burners arranged in the il'urnaee, 1 (lo not (lenire to limity myself toizhis number. Eaeh burner, however, should have avseparate ilue. Y

Should the gaseupply at any time cease, the partition-walls '/i azul 'f are removed, 4o'rether with the burners, and elle furnace may then he heated by solid fuel unlsil a Supply of is again obtained, when rthe walls' are again huilt, and the burnerl plaeed in position and connected with i'he gas-supply pipe r.

The advantages of my invention are, the saving of fueh' owinf.)r lo the more perfect miugling ofthe gas and air; the superior quality of metal produced, owing to the absence of aireurrents, and the ease and rapidity of placing the burners iu position wiihonbv material change in the l'urn-aee.

My improved. device@ may he applied to heat/ing and other ineiallurgieal as well as pinhlling furnaces.

.Hziving lhun lewrihed niv invention, what I claim, and iieire o` Sernre hy Leiters Patenr. i5-- 1..,In a metallurgical l'urnaee, the arrange# nient oif'a gas-burner inside olan outer Hue, Said burner having an interiorairpa: a series of ineiined escape-'jets l'or the gaa, whereinT a current ol" grau is inierspersml he tween an inner and outer current ol' air, and 'the whole Lhorouglily Aeen!miuehfl, auhslan- Lially :is speeilieil.

i i i i i i i l i i l i i l i 2. In a metallurgie furnace, a burner ranged in a :(lue below the grate-hars, the

.burner being so constructed and sir-narod .in

longitmlinal detachable partitions arranged` therein to forni air-(lues l`or the gas-burners, and gas-burners arranged in Said air-ilues, substantially as and for the purposes specified.

. In a metallurgie. i'urnaee7 the eoinhinaion. with a iire-eha`inher having suitahle gralehara. ol' a gashurner arranged. below the grall...haru, and detachable partifioirwalls arranged in lhe ash-pitto forni ainflues in the aSh-piiLaromul the gas-burners, mhSuinLi-illy as and for the purposes Speeilieil.

In i'rniiinony whereof.' lA have hereunto `my hainl this 19th (lay ol' Janna/ry, A. l). 1884i.

lil )VFA l-fl) J. DASfJ-ll if? l1 lunesaesz 

